Simulation on phosphorus release characteristics of Poyang Lake sediments under variable water levels and velocities

doi:10.1007/s11442-017-1401-9

	Simulation on phosphorus release characteristics of Poyang Lake sediments under variable water levels and velocities
	Tong Yali; Liang Tao; Wang Lingqing; Li Kexin
刊名	JOURNAL OF GEOGRAPHICAL SCIENCES
	2017-06-01
卷号	27 期号:6 页码:697-710
关键词	hydrodynamic factors sediment-water interface total phosphorous total dissolved phosphorous soluble reactive phosphate Poyang Lake
ISSN号	1009-637X
DOI	10.1007/s11442-017-1401-9
通讯作者	Wang Lingqing(wanglq@igsnrr.ac.cn) ; Li Kexin(likx@igsnrr.ac.cn)
英文摘要	Since the construction of the Three Gorges Dam, the Poyang Lake hydrological characteristics obviously changed. During the impoundment period of the Three Gorges Reservoir, the hydrodynamic factors of Poyang Lake varied. Water level dropped, the velocity decreased and water exchange time lengthened, which changed the release of phosphorous from sediments. In order to investigate how the hydrodynamic factors influence the release of phosphorous from sediments, we used a two-way annular flume device to simulate the release characteristics of phosphorous from sediments under variable water levels and velocities. We found that both water level rising and velocity increasing could enhance the disturbance intensity to sediments, which caused the increase of suspended solids (SS) concentration, total phosphorus (TP) concentration in the overlying water, and the ability that phosphorus released to overlying water from sediments enhanced as well: when overlying water velocity maintained 0.3 m/s, SS concentration increased to 4035.85 mg/L at the water level 25 cm which was about 25 times compared to the minimum value and TP concentration in the overlying water also reached the maximum value at the water level 25 cm which was 1.2 times that of the value at 10 cm; when water level maintained 15 cm, SS concentration increased to 4363.35 mg/L at the velocity of 0.5 m/s which was about 28 times compared to the value of 0 m/s, and TP concentration in the overlying water increased from 0.11 mg/L to 0.44 mg/L. When the water level maintained 15 cm, the phosphorous release rate reached the maximum value of 4.86 mg/(md) at 0.4 m/s. The concentration of total dissolved phosphorous (TDP) and soluble reactive phosphate (SRP) both in overlying water and sediment-water interface were negatively correlated with pH. Using the parabolic equation, the optimum water level at a velocity of 0.3 m/s was calculated to be 0.57 cm, and the optimum velocity at water level of 15 cm was found to be 0.2 m/s.
资助项目	National Key Project for Basic Research[2012CB417004]
WOS关键词	SHALLOW LAKES ; YANGTZE-RIVER ; NITROGEN ; TAIHU ; CHINA ; RESUSPENSION ; WIND ; DISTURBANCE ; SUSPENSION ; DYNAMICS
WOS研究方向	Physical Geography
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000398212600004
资助机构	National Key Project for Basic Research
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/64667]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang Lingqing; Li Kexin
作者单位	Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Tong Yali,Liang Tao,Wang Lingqing,et al. Simulation on phosphorus release characteristics of Poyang Lake sediments under variable water levels and velocities[J]. JOURNAL OF GEOGRAPHICAL SCIENCES,2017,27(6):697-710.
APA	Tong Yali,Liang Tao,Wang Lingqing,&Li Kexin.(2017).Simulation on phosphorus release characteristics of Poyang Lake sediments under variable water levels and velocities.JOURNAL OF GEOGRAPHICAL SCIENCES,27(6),697-710.
MLA	Tong Yali,et al."Simulation on phosphorus release characteristics of Poyang Lake sediments under variable water levels and velocities".JOURNAL OF GEOGRAPHICAL SCIENCES 27.6(2017):697-710.